Cillian Murphy
J. Robert Oppenheimer
Emily Blunt
Kitty Oppenheimer
Matt Damon
Leslie Groves
Robert Downey Jr.
Lewis Strauss
Florence Pugh
Jean Tatlock
Josh Hartnett
Ernest Lawrence
Casey Affleck
Boris Pash
Rami Malek
David Hill
Kenneth Branagh
Niels Bohr
Benny Safdie
Edward Teller
Jason Clarke
Roger Robb
Dylan Arnold
Frank Oppenheimer
Tom Conti
Albert Einstein
James D'Arcy
Patrick Blackett
David Dastmalchian
William Borden
Dane DeHaan
Kenneth Nichols
Alden Ehrenreich
Senate Aide
Tony Goldwyn
Gordon Gray
Jefferson Hall
Haakon Chevalier
David Krumholtz
Isidor Rabi
Matthew Modine
Vannevar Bush
Scott Grimes
Counsel
Kurt Koehler
Thomas Morgan
John Gowans
Ward Evans
Macon Blair
Lloyd Garrison
Harry Groener
Senator McGee
Gregory Jbara
Chairman Magnuson
Ted King
Senator Bartlett
Tim DeKay
Senator Pastore
Steven Houska
Senator Scott
Petrie Willink
Dutch Student
Matthias Schweighöfer
Werner Heisenberg
Alex Wolff
Luis Alvarez
Josh Zuckerman
Rossi Lomanitz
Rory Keane
Hartland Snyder
Michael Angarano
Robert Serber
Emma Dumont
Jackie Oppenheimer
Sadie Stratton
Mary Washburn
Britt Kyle
Barbara Chevalier
Guy Burnet
George Eltenton
Tom Jenkins
Richard Tolman
Louise Lombard
Ruth Tolman
Michael Andrew Baker
Joe Volpe
Jeff Hephner
Congressman
Olli Haaskivi
Edward Condon
David Rysdahl
Donald Hornig
Josh Peck
Kenneth Bainbridge
Jack Quaid
Richard Feynman
Brett DelBuono
Concerned Scientist
Gustaf Skarsgård
Hans Bethe
James Urbaniak
Kurt Gödel
Trond Fausa Aurvåg
George Kistiakowsky
Devon Bostick
Seth Neddermeyer
Danny Deferrari
Enrico Fermi
Christopher Denham
Klaus Fuchs
Jessica Erin Martin
Charlotte Serber
Ronald Auguste
J. Ernest Wilkins
Máté Haumann
Leo Szilard
Olivia Thirlby
Lilli Hornig
Jack Cutmore-Scott
Lyall Johnson
Harrison Gilbertson
Philip Morrison
James Remar
Henry Stimson
Will Roberts
George C. Marshall
Pat Skipper
James Byrnes
Steve Coulter
James Conant
Jeremy John Wells
AAF Officer
Sean Avery
Weatherman
Adam Kroeger
Army Captain
Drew Kenney
Soldier
Bryce Johnson
AAF Officer 2
Flora Nolan
Burn Victim
Kerry Westcott
Laughing Woman
Christina Hogue
Kissing Woman
Clay Bunker
Kissing Man
Tyler Beardsley
Weeping Man
Maria Teresa Zuppetta
Consoling Woman
Kate French
Presidential Aide
Gary Oldman
Harry Truman
Hap Lawrence
Lyndon Johnson
Meg Schimelpfenig
Senator's Assistant (uncredited)
